Structural, impedance and Mössbauer studies of magnesium ferrite synthesized via sol-gel auto-combustion process
Joint Authors
Naz, Sumaira
Durrani, Shahid Khan
Mazhar, Mahmud
Siddique, Muhammad
Nadim, Muhammad
Source
Journal of Saudi Chemical Society
Issue
Vol. 21, Issue 8 (31 Dec. 2017), pp.899-910, 12 p.
Publisher
Publication Date
2017-12-31
Country of Publication
Saudi Arabia
No. of Pages
12
Main Subjects
Abstract EN
Crystalline magnesium ferrite (MgFe2O4) spinel oxide powder was synthesized by nitrate–citrate sol–gel auto-combustion process with stoichiometric composition of metal nitrate salts, urea and citric acid.
The study was focused on the modification of synthesis conditions and effect of these modified conditions on the structural and electrical properties of synthesized MgFe2O4 ceramic materials.
Phase composition, crystallinity, structure and surface morphology were studied by X-ray diffraction, FTIR and SEM.
Pure single phase MgFe2O4 spinel ferrite was obtained after calcination at 850 C.
Rietveld refinement of XRD result confirmed the single cubic phase spinel oxide with the lattice constant of a= 8.3931 A ˚ and Fd3m symmetry.
UV–visible absorption study of calcined powder revealed an optical band gap of 2.17 eV.
SEM images of sintered specimens (1050–1450 C) showed that the grain size increased with the increase in sintering temperature.
From the impedance results of the sintered MgFe2O4 specimens, it was found that the resistance of grain, grain boundary and electrode effect decreased with an increase in sintering temperature and associated grain growth.
In the intermediate frequency region lowering of impedance and dielectric values was observed due to the decrease in grain boundary areas.
Mo¨ ssbauer studies indicated that magnesium ferrite had a mixed spinel structure in calcined and sintered samples, however, the well refined single phas
American Psychological Association (APA)
Durrani, Shahid Khan& Naz, Sumaira& Mazhar, Mahmud& Nadim, Muhammad& Siddique, Muhammad. 2017. Structural, impedance and Mössbauer studies of magnesium ferrite synthesized via sol-gel auto-combustion process. Journal of Saudi Chemical Society،Vol. 21, no. 8, pp.899-910.
https://search.emarefa.net/detail/BIM-781232
Modern Language Association (MLA)
Durrani, Shahid Khan…[et al.]. Structural, impedance and Mössbauer studies of magnesium ferrite synthesized via sol-gel auto-combustion process. Journal of Saudi Chemical Society Vol. 21, no. 8 (Dec. 2017), pp.899-910.
https://search.emarefa.net/detail/BIM-781232
American Medical Association (AMA)
Durrani, Shahid Khan& Naz, Sumaira& Mazhar, Mahmud& Nadim, Muhammad& Siddique, Muhammad. Structural, impedance and Mössbauer studies of magnesium ferrite synthesized via sol-gel auto-combustion process. Journal of Saudi Chemical Society. 2017. Vol. 21, no. 8, pp.899-910.
https://search.emarefa.net/detail/BIM-781232
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 908-910
Record ID
BIM-781232